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Contents
module Virgo
module SearchHelper
# Extracts the portion of the document that matches query text.
# Consider refactoring into a complex activerecord
# query leveraging "ts_headling". For present though
# we will perform this with a regex (on the document,
# which is constructed at the query level -
# see app/models/concerns/questions/search.rb)
def search_snippet(document, query, opts={})
length = opts[:length] || 300
start_padding = opts[:start_padding] || 30
words = query.split(" ")
text = original_text = document
matcher = Regexp.new(Regexp.union(words).source, Regexp::IGNORECASE)
if text.length > length
first_keyword_occurrence = text =~ matcher
if first_keyword_occurrence && first_keyword_occurrence > start_padding
start_offset = first_keyword_occurrence - start_padding
else
start_offset = 0
end
truncated = text.slice(start_offset, text.length)
text = truncated.slice(0, length)
if text.length < length
# pad beginning with existing text
padding_length = length - text.length
padding_text = original_text.slice(0, padding_length)
text = "...#{padding_text}...#{text}..."
else
text = "...#{text}..."
end
end
highlighted = text.gsub(matcher) { |match| "<strong class='match'>#{match}</strong>" }
highlighted.html_safe
end
end
end
Version data entries
42 entries across 42 versions & 1 rubygems